/*
 *    Copyright (c) 2006 ThoughtWorks, Inc.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.thoughtworks.turtlemock.constraint;

import com.thoughtworks.turtlemock.fluapi.Closure;

public class ExceptionContraint implements Constraint {
    private Class expectedExceptionType;

    public ExceptionContraint(Class exceptionType) {
        expectedExceptionType = exceptionType;
    }

    public CheckResult check(Object closure) {
        try {
            ((Closure) closure).execute();
        } catch (Throwable t) {
            if (expectedExceptionType.isInstance(t)) {
                return CheckResult.PASS;
            }
            throw new RuntimeException(t);
        }
        return new CheckResult(expectedExceptionType + "expected, but haven't thrown", false);
    }
}

